Thread guiding roller



Dec. 27, 1955 w. BAKKER 2,728,446

THREAD GUIDING ROLLER Filed May 2, 1950 INVENTOR BY WW 7 ATTORNEY UnitedStates Patent TImEAD GUIDING ROLLER Willem Bakker, Arnhem, Netherlands,assignor to American Enka Corporation, Enka, N. C., a corporation ofDelaware Application May 2, 1950, Serial No. 159,628

Claims priority, application Netherlands June 10, 1949 3 Claims. (Cl.203-355) The present invention relates to a thread guiding roller, andmore particularly to a roller for conveying a plurality of substantiallyparallel synthetic threads through the successive treatments required inthe manufacture thereof. During the spinning and aftertreatment ofsynthetic threads, a large number of such wet threads are guided inparallel around one or more rollers in each of the treating zones, eachroller being manufactured from materials that are resistant to thetreatment liquids. See, for example, the rollers in U. S. Patent2,674,113.

When-the roller is constructed in one unit, it must be relatively longin order to accommodate a large number of parallel threads, and in caseof breakage or damage, the entire roller must be replaced, which is anexpensive operation. One way to overcome this disadvantage has been touse a number of narrow rollers corresponding to the number of threads tobe conveyed, each of the rollers being mounted on a common shaft andseparated from each other by spacer plates or collars. However, when itbecomes necessary to replace one of the individual rollers, part of theset must be dismantled in order to remove and replace the damagedroller.

It is, therefore, an object of the present invention to provide a threadguiding roller which is constructed of a cylindrical core on which aremounted a plurality of spacer plates or collars having circumferentialgrooves on each side thereof, and between each pair of collars areassembled metallic sheets bent to conform to the shape of the metalliccore and providing thread guiding surfaces.

Other objects and advantages of this invention will be apparent from thefollowing detailed description when considered in conjunction with theaccompanying drawings, wherein:

Figure 1 is a longitudinal sectional view of a preferred form of rollershowing a series of spaced collars retaining the sheets constituting thethread guiding surfaces in position, one of said collars being axiallydisplaced from engagement with the adjacent sheet for the purpose ofillustration;

Figure 2 is a view in transverse section taken on line 2-2 of Figure l;and

Figure 3 shows a detail of a portion of one sheet constituting thethread guiding surface which is provided with undulations extending inan axial direction of the roller.

Referring to the drawings, the numeral generally indicates the rollerwhich consists of a core 11 having a series of grooves 12 runninglongitudinally thereof for accommodating projections 13 formed in spacerplates or collars 14 when they are mounted on the core 11 by sliding thecollars axially thereof.

On each side of each collar 14 there is formed a circumferential groove15, and between each pair of collars 14 a strip of sheet material 16 isretained in the adjacent grooves after it has been bent to conform tothe shape of the core 11.

The roller is assembled by sliding a collar 14 into a 2,728,446 PatentedDec. 27, 1955 predetermined position on the core 11 and then bending thesheet material 16 so that it will fit into the groove 15 on one side ofthe collar and the sheet is retained in position by sliding a secondcollar 14 longitudinally of the roller until the other edge of the sheetengages the adjacent groove of the second collar. This same operation isrepeated until the required number of sheets constituting thread guidingsurfaces have been arranged in position between the collars. Any knowntype of fastening or stop member can be mounted on each end of theroller after all the collars and sheets have been clamped in position,whereby the whole roller will function as a rigid unitary unit.

It is obvious from the above described construction that in the eventone of the sheets or thread guiding surfaces becomes damaged, or shoudit be desirable to replace the same with a different material, suchreplacement can be effected readily by merely moving one of the collarsout of engagement at one end of the roller so that the other collars canbe moved longitudinally to disengage the sheet to be removed. Such aroller has the advantage that the shape of the thread guiding surfacescan be altered at will, e. g., the sheet may be smooth and it may bedesirable to replace the same with an undulating thread guiding surfacesuch as that shown in Figure 3, in which case the replacement can beeffected readily. When the undulations run in an axial or longitudinaldirection of the roller, the sheet material may also be formed in theshape of a flat V in transverse section as shown in Figure 1. This Vshape makes it possible for the excess liquid to be guided to the sidesof the sheet by the centrifugal force created by the rotation of theroller. When the liquid forms at the sides it can be removed readily bymeans of stripping guides positioned on the adjacent collars.

The core of the roller may be solid, but it is preferable that it behollow, particularly in cases where the roller is of large diameter andit is required to rotate at high speeds. The grooves in the core forreceiving the projections on the interior surfaces of the collars may beconstructed of the same material from which the core is manufactured. Itis also possible to use a smooth core with a lining in which the groovesare provided. In this way a roller resistant to the chemical influencesto which it is subjected can be manufactured in a simple manner. Thelining may, for example, be manufactured from soft rubber or otherchemically resistant material. The strips of sheet material thatconstitute the thread guiding surfaces can be manufactured from anydesired material provided it is sufficiently resistant'to the chemicalswith which it comes in contact.

What is claimed is:

1. A thread guiding roller comprising a cylindrical core, a plurality ofspaced, individual collars circumferentially grooved on each sidethereof, said collars being individually, axially movable of the core,means for preventing rotational movement of each of said collars withrespect to said core comprising a projection on one of said members anda complementary recess therefor on the other said member, corrosiveresistant, flexible, metallic sheets held in the form of hollowcylinders by engagement of each sheet in adjacent grooves between eachpair of collars whereby any sheet may be removed transversely of theaxis of the core at will by axial movement of the necessary collars.

2. A thread guiding roller according to claim 1, in which said meanscomprise a series of longitudinal grooves in said core and a series ofprojections in said collars.

3. A thread guiding roller according to claim 1 in which the sheets. areprovided with undulations running parallel to the axis of the roller andhaving the shape of a fiat V in a direction transverse to the axis ofthe roller.

5 References Cited in the file of this patent UNITED STATES PATENTS798,457 Schmidt Aug. 29, 19.05 920,603 Michelin May 4, 1909 10 1,202,693Feix Oct. 24. 1916 4 Tone July 29, 1924 Bryan -"---.H-,- Nnv. 19, 1229Scott May 15, 1934 Levoy et a1. Aug, 28, 1934 Allsop May 11, 1937Mulhoiland Ian. 25, 1938 FOREIGN PATENTS Great Britain Nov. 20, 1915

